Textile product and process of making the same.



ATET TQ;

WILLIAM L. FRANCK, OF PHILADELPHIA, PENNSYLVANIA.

, TEXTILE PRODUCT AND PROCESS OF MAKIN G THE SAME.

No Drawing.

To all whom it may concern:

Be it known that 1, WILLIAM L, FRANCE, a citizenof the United States,-residing in the city of Philadelphia, county of Philadelphia, and State of Pennsylvania, have in-. vented a certain Textile Product and Process of Making the Same, of which the following is a specification.

My invention relates to a process for and the product resulting from the treatment of textile fibers, articularly vegetable but also animal fibers, for the purpose of rendering them resistant to the influence of moisture and preventing mold growth and rotting, without impairing the strength of and with the provision of soft and pliable properties in the product.

The process comprises a treatment for effooting an intimate combination between the textile fibers and chromium sesquioxid, which is obtained by subjecting the wetted fibers, as in the case of cotton yarn, to any bath capable of liberating chromium sesquioxid in nascent state in the presence of the fiber, for example, to a bath made up as follows:

F our (4) ounces avoirdupois of sodium dichromate are dissolved in water, eight (8) fluid ounces of commercial hydrochloric acid are added thereto, two (2) ounces of glucose are added to the resulting solution, and then three (3) ounces 'avoirdupois of an alkali such as sal soda (sodium corbonate) are added, with stirring, so that the bath is brought nearly to neutrality. Two (2) ounces avoirdupois of sodium thiosulfate and two (2) ounces of sodium sulfite are now added and the bath is ready for use.

A result of the treatment is that all se aration of sulfur is avoided, so that t e fiber takes from the clear solution, maintained at near neutrality, the chromium sesquioxid and holds it in most intimate combination. After the washing of the treated product has been effected, the fibers have chromium sequioxid deposited thereon and fastened thereto so strongly that it cannot be removed, it being possible to boil the treated fiber in water without appreciable loss of weight. Analysis of the repeatedly washed fiber showed a mineral residue of ash amounting to 1.67%, of which 77.26% was chromium sesquioxid. The product is possessed of increased tensile strength,as shown by practical tests, does not disinte- Specification of Letters Patent. i Patented Aug. 27, 1918.,- Application filed March 9, 1917. Serial No. 153,569.

grate under the influence of continued exposure to water or to Water and air alternately, and resists mildewing. Due to the glucose, it is also soft and pliable so that it can be used readily in all kinds of manufactures for which yarns are adapted. 1

It will be understood that the results of the treatment are distinguished from the results of common water-proofing with oils and similar mixtures Where the" fibers or fabrics are coated with an impervious film.

The process and product difier essentially from the ordinary chrome-mordanting in.

that the latter is concerned only in getting directly or indirectly a deposit of chromium oxid which will form a stable color product or lake with the dyestufi, without reference to anything more'than color result, while my process effects the separation of chromium oxid under such circumstances as to cause it, liberated gradually in nascent state in the presence of the textile fabric, to combine with the latter to form a product in a high degree water-repellent and mold-proof.

My improved process and product are especially valuable in the manufacture of such articles as woven cotton hose, tires and other articles subject to moisture.

Having described my invention, I claim:

1. The combination with textile fiber, of

chromium sesquioxid with production of a water repellent product, substantially as and for the purpose set forth.

2. The combination with textile fiber, of chromium sesquioxid and glucose with the production of a water repellent product that is soft and pliable, substantially as and for the purpose set forth.

3. The rocess which consists in treating a textile ber with a solution in which sodium dichromate, a mineral acid and a reducing agent have been used, with production of chormium sesquioxid deposlted on and fastened to the fiber so as to render it water repellent.

4. The process which consists in treating sodium dichromate with a mineral acid for the production of a solution containing chromic acid, adding to this solution sufficient alkali to effect approximate neutrality, adding an agent capable of reducing the liberated chromic acid to chromium sesquioxid, and treating textile fiber therewith.

5 The process which consists in forming a bath by combining sodium dichromate,

hydrchloric acid, sodium carbonate, and sodium thiosulfate, and treating textile fiber therewith.

6. The process which consists in forming a bath by combining, sodium dichromate hydrochloric acid, sodium carbonate and sodium sulfite, and treating textile fiber therewith.

7. The process which consists in treating textile fiber with a solution in which a salt of chromic acid, mineral acid and a reducing agent have been used with the production of chormium sesquioxid deposited on and fastened to the fiber so as to render it water repellent and mold proof.

8. The process Which consists in forming a bath by combining a salt of chromic acid, a mineral acid, an alkali, and a salt capable of evolving sulfur dioxid in the presence of the ne /ace? with.

9. The process which consists in forming a bath by combining sodium dichromate, hydrochloric acid, an alkali, sodium thiosulfate and sodium sulfite, and treating textile fiber therewith.

10. The process which consists in treating textile fiber in a bath formed, in approximate proportions, of four (4) ounces of sodium dichromate dissolved in water, eight (8) ounces of commercial hydrochloric acid, two (2) ounces of glucose, three (3) ounces of sal soda, two (2) ounces of sodium thiosulfate, and two (2) ounces of sodium sulfite.

In testimony whereof I have hereunto set my name this 23rd day of February, 1917.

/VTLLTAM L. runner r. 

